1 /* 2 * CPU features/facilities for s390x 3 * 4 * Copyright IBM Corp. 2016, 2018 5 * Copyright Red Hat, Inc. 2019 6 * 7 * Author(s): David Hildenbrand <david@redhat.com> 8 * 9 * This work is licensed under the terms of the GNU GPL, version 2 or (at 10 * your option) any later version. See the COPYING file in the top-level 11 * directory. 12 */ 13 14 #include "qemu/osdep.h" 15 #include "qemu/module.h" 16 #include "cpu_features.h" 17 18 #define DEF_FEAT(_FEAT, _NAME, _TYPE, _BIT, _DESC) \ 19 [S390_FEAT_##_FEAT] = { \ 20 .name = _NAME, \ 21 .type = S390_FEAT_TYPE_##_TYPE, \ 22 .bit = _BIT, \ 23 .desc = _DESC, \ 24 }, 25 static const S390FeatDef s390_features[S390_FEAT_MAX] = { 26 #include "cpu_features_def.inc.h" 27 }; 28 #undef DEF_FEAT 29 30 const S390FeatDef *s390_feat_def(S390Feat feat) 31 { 32 return &s390_features[feat]; 33 } 34 35 S390Feat s390_feat_by_type_and_bit(S390FeatType type, int bit) 36 { 37 S390Feat feat; 38 39 for (feat = 0; feat < ARRAY_SIZE(s390_features); feat++) { 40 if (s390_features[feat].type == type && 41 s390_features[feat].bit == bit) { 42 return feat; 43 } 44 } 45 return S390_FEAT_MAX; 46 } 47 48 void s390_init_feat_bitmap(const S390FeatInit init, S390FeatBitmap bitmap) 49 { 50 int i, j; 51 52 for (i = 0; i < (S390_FEAT_MAX / 64 + 1); i++) { 53 if (init[i]) { 54 for (j = 0; j < 64; j++) { 55 if (init[i] & 1ULL << j) { 56 set_bit(i * 64 + j, bitmap); 57 } 58 } 59 } 60 } 61 } 62 63 void s390_fill_feat_block(const S390FeatBitmap features, S390FeatType type, 64 uint8_t *data) 65 { 66 S390Feat feat; 67 int bit_nr; 68 69 switch (type) { 70 case S390_FEAT_TYPE_STFL: 71 if (test_bit(S390_FEAT_ZARCH, features)) { 72 /* Features that are always active */ 73 set_be_bit(2, data); /* z/Architecture */ 74 set_be_bit(138, data); /* Configuration-z-architectural-mode */ 75 } 76 break; 77 case S390_FEAT_TYPE_PTFF: 78 case S390_FEAT_TYPE_KMAC: 79 case S390_FEAT_TYPE_KMC: 80 case S390_FEAT_TYPE_KM: 81 case S390_FEAT_TYPE_KIMD: 82 case S390_FEAT_TYPE_KLMD: 83 case S390_FEAT_TYPE_PCKMO: 84 case S390_FEAT_TYPE_KMCTR: 85 case S390_FEAT_TYPE_KMF: 86 case S390_FEAT_TYPE_KMO: 87 case S390_FEAT_TYPE_PCC: 88 case S390_FEAT_TYPE_PPNO: 89 case S390_FEAT_TYPE_KMA: 90 case S390_FEAT_TYPE_KDSA: 91 case S390_FEAT_TYPE_SORTL: 92 case S390_FEAT_TYPE_DFLTCC: 93 set_be_bit(0, data); /* query is always available */ 94 break; 95 default: 96 break; 97 }; 98 99 feat = find_first_bit(features, S390_FEAT_MAX); 100 while (feat < S390_FEAT_MAX) { 101 if (s390_features[feat].type == type) { 102 bit_nr = s390_features[feat].bit; 103 /* big endian on uint8_t array */ 104 set_be_bit(bit_nr, data); 105 } 106 feat = find_next_bit(features, S390_FEAT_MAX, feat + 1); 107 } 108 } 109 110 void s390_add_from_feat_block(S390FeatBitmap features, S390FeatType type, 111 uint8_t *data) 112 { 113 int nr_bits, le_bit; 114 115 switch (type) { 116 case S390_FEAT_TYPE_STFL: 117 nr_bits = 16384; 118 break; 119 case S390_FEAT_TYPE_PLO: 120 case S390_FEAT_TYPE_SORTL: 121 case S390_FEAT_TYPE_DFLTCC: 122 nr_bits = 256; 123 break; 124 default: 125 /* all cpu subfunctions have 128 bit */ 126 nr_bits = 128; 127 }; 128 129 le_bit = find_first_bit((unsigned long *) data, nr_bits); 130 while (le_bit < nr_bits) { 131 /* convert the bit number to a big endian bit nr */ 132 S390Feat feat = s390_feat_by_type_and_bit(type, BE_BIT_NR(le_bit)); 133 /* ignore unknown bits */ 134 if (feat < S390_FEAT_MAX) { 135 set_bit(feat, features); 136 } 137 le_bit = find_next_bit((unsigned long *) data, nr_bits, le_bit + 1); 138 } 139 } 140 141 void s390_feat_bitmap_to_ascii(const S390FeatBitmap features, void *opaque, 142 void (*fn)(const char *name, void *opaque)) 143 { 144 S390FeatBitmap bitmap, tmp; 145 S390FeatGroup group; 146 S390Feat feat; 147 148 bitmap_copy(bitmap, features, S390_FEAT_MAX); 149 150 /* process whole groups first */ 151 for (group = 0; group < S390_FEAT_GROUP_MAX; group++) { 152 const S390FeatGroupDef *def = s390_feat_group_def(group); 153 154 bitmap_and(tmp, bitmap, def->feat, S390_FEAT_MAX); 155 if (bitmap_equal(tmp, def->feat, S390_FEAT_MAX)) { 156 bitmap_andnot(bitmap, bitmap, def->feat, S390_FEAT_MAX); 157 fn(def->name, opaque); 158 } 159 } 160 161 /* report leftovers as separate features */ 162 feat = find_first_bit(bitmap, S390_FEAT_MAX); 163 while (feat < S390_FEAT_MAX) { 164 fn(s390_feat_def(feat)->name, opaque); 165 feat = find_next_bit(bitmap, S390_FEAT_MAX, feat + 1); 166 }; 167 } 168 169 #define FEAT_GROUP_INIT(_name, _group, _desc) \ 170 { \ 171 .name = _name, \ 172 .desc = _desc, \ 173 .init = { S390_FEAT_GROUP_LIST_ ## _group }, \ 174 } 175 176 /* indexed by feature group number for easy lookup */ 177 static S390FeatGroupDef s390_feature_groups[] = { 178 FEAT_GROUP_INIT("plo", PLO, "Perform-locked-operation facility"), 179 FEAT_GROUP_INIT("tods", TOD_CLOCK_STEERING, "Tod-clock-steering facility"), 180 FEAT_GROUP_INIT("gen13ptff", GEN13_PTFF, "PTFF enhancements introduced with z13"), 181 FEAT_GROUP_INIT("msa", MSA, "Message-security-assist facility"), 182 FEAT_GROUP_INIT("msa1", MSA_EXT_1, "Message-security-assist-extension 1 facility"), 183 FEAT_GROUP_INIT("msa2", MSA_EXT_2, "Message-security-assist-extension 2 facility"), 184 FEAT_GROUP_INIT("msa3", MSA_EXT_3, "Message-security-assist-extension 3 facility"), 185 FEAT_GROUP_INIT("msa4", MSA_EXT_4, "Message-security-assist-extension 4 facility"), 186 FEAT_GROUP_INIT("msa5", MSA_EXT_5, "Message-security-assist-extension 5 facility"), 187 FEAT_GROUP_INIT("msa6", MSA_EXT_6, "Message-security-assist-extension 6 facility"), 188 FEAT_GROUP_INIT("msa7", MSA_EXT_7, "Message-security-assist-extension 7 facility"), 189 FEAT_GROUP_INIT("msa8", MSA_EXT_8, "Message-security-assist-extension 8 facility"), 190 FEAT_GROUP_INIT("msa9", MSA_EXT_9, "Message-security-assist-extension 9 facility"), 191 FEAT_GROUP_INIT("msa9_pckmo", MSA_EXT_9_PCKMO, "Message-security-assist-extension 9 PCKMO subfunctions"), 192 FEAT_GROUP_INIT("mepochptff", MULTIPLE_EPOCH_PTFF, "PTFF enhancements introduced with Multiple-epoch facility"), 193 FEAT_GROUP_INIT("esort", ENH_SORT, "Enhanced-sort facility"), 194 FEAT_GROUP_INIT("deflate", DEFLATE_CONVERSION, "Deflate-conversion facility"), 195 }; 196 197 const S390FeatGroupDef *s390_feat_group_def(S390FeatGroup group) 198 { 199 return &s390_feature_groups[group]; 200 } 201 202 static void init_groups(void) 203 { 204 int i; 205 206 /* init all bitmaps from gnerated data initially */ 207 for (i = 0; i < ARRAY_SIZE(s390_feature_groups); i++) { 208 s390_init_feat_bitmap(s390_feature_groups[i].init, 209 s390_feature_groups[i].feat); 210 } 211 } 212 213 type_init(init_groups) 214